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Rockdale, Washington
Country United States
State Washington
County King
Established 1912
Elevation
2,500 ft (800 m)
Time zone UTC-8 (Pacific (PST))
 • Summer (DST) UTC-7 (PDT)

Rockdale is a ghost town located in King County, Washington, in the Pacific Northwest region of the United States. It is no longer an active community.

What Was Rockdale?

Rockdale was a small community that existed for a short time. It was named "Rockdale" because there were many rocks near where the town was built.

When Was Rockdale Established?

A post office opened in Rockdale in 1912. This means the town was officially recognized around that time. However, the post office only stayed open until 1915.

Where Was Rockdale Located?

Rockdale was in the Cascade Range mountains. It was just south of a mountain pass called Snoqualmie Pass. The town was important because it was at the western entrance of the Snoqualmie Tunnel.

The Snoqualmie Tunnel Connection

The Snoqualmie Tunnel was a big project built by the Chicago, Milwaukee, St. Paul and Pacific Railroad. This railroad was also known as "The Milwaukee Road." Workers built the tunnel between 1912 and 1914. Rockdale was right next to this important tunnel.

Rockdale's Elevation and Modern Use

Rockdale was located about 2,500 feet (762 meters) above sea level. It was also about 400 feet (122 meters) higher than the eastbound lanes of Interstate 90. This highway used to be called U.S. Route 10.

Today, the old tunnel and railroad path are part of Iron Horse State Park. This area is now a rail trail, which means it's a path for walking, biking, and other outdoor activities.

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